问题补充:
先化简,后求值:[(x-y)²+(x-y)(x-y)]÷2x,其中x=3,y=1.5
答案:
[(x-y)²+(x-y)(x-y)]÷2x
=2[(x-y)²]÷2x
=[(x-y)²]÷x
=【3-1.5】²÷3
=1.5²÷3
=2.25÷3
=0.75
时间:2021-12-13 21:52:15
先化简,后求值:[(x-y)²+(x-y)(x-y)]÷2x,其中x=3,y=1.5
[(x-y)²+(x-y)(x-y)]÷2x
=2[(x-y)²]÷2x
=[(x-y)²]÷x
=【3-1.5】²÷3
=1.5²÷3
=2.25÷3
=0.75
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